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noun (pl) -niums, -nia (-nɪə)
a period or cycle of seven years
Word Origin
C19: from Latin, from septem seven + -ennium, from annus year
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Examples from the Web for septennium
Historical Examples
  • Amid considerable opposition he began, in 1870, the first of his three periods of administration—the septennium, as it was termed.

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